Drive for a rotary member



J E BATTERSBY DRIVE FOR A ROTARY MEMBER Dec. 30, 1952 Flled Aug 1; 1948"Dec 30, 1952 J. E. BATTERSBY 2,623,397

DRIVE FOR A ROTARY MEMBER Filed Au 11, 1948 I 2 SHEETS-SHEET 2 PatentedDec. 30, 1952 2,623,397 DRIVE FOR A ROTARY MEMBER James EckersleyBattersby,

London, England, as-

signor to Masson Scott & Company Limited,

London, England Application August 11, 1948, Serial No. 43,638

In Great Britain August 18,

'7 Claims. 1

The present invention relates to an improvement in cross cutters forcutting a uniformly moving web of paper or the like and which cuttersinclude a rotatable knife cooperable with a stationary knife with therotary knife being spirally mounted so that the web or webs areprogressively severed across the width thereof.

The invention particularly relates to the mounting of the knife meansand the driving of the same.

More particularly the invention relates to the specific disposition of aframe carrying the knife means with respect to the main frame of themachine.

In order to obtain a square cut with an arrangement of the above kind,the axis of the rotary knife member must be inclined with respect to thelongitudinal axis of the web, the angle varying in accordance with therespective knife and web velocities, requiring an adjustable mounting ofthe drum or equivalent knife-carrying member and appropriateconstruction and arrangement of the drive to accommodate suchadjustments.

It has been customary in the past to drive the knife drum or equivalentknife-carrying member through a bevel gear on one end of the drum shaftmeshing with a bevel pinion driving shaft, the drum bearings beingarranged so that they may be adjustably displaced upon their supportsabout the axis of the said vertical shaft. One of the drawbacks of thisform of drive is that the drive mechanism is relatively complicated andtherefore expensive, and further the cutter drum and bed plate requireto be bodily displaced to a. considerable degree in order to vary theinclination of its axis within the required limits.

It is one of the objects of the present invention to provide an improvedform of drum or cutter mounting and drive therefore by virtue of whichthe required adjustments are accomplished by a reduction of the distancethrough which the drum and bed plate are required to be displaced.

According to the invention, a rotary cutting means of the kind describedis mounted for adlusting movement to vary the inclination of the cutterwith respect to the web path and is driven by belt or rope means,preferably multiple belts or ropes in conjunction with correspondinglygrooved pulleys, disposed about the axis of adjusting displacement. Inthe preferred arrangeon a vertical ment multiple belts of V section,engaged in correspondingly grooved pulleys are employed.

According to a further feature of the invention, the driving belt, orgroup of belts, is disposed to lie in a plane substantially parallel tothe axis of rotation of the cutting means and preferably in a plane alsopassing through or near the cutting edge of the stationaiy or deadknife.

The arrangement requires the belt pulley to be mounted on a shaft atright-angles to the drum shaft and driving the latter through gearing,preferably worm gearing.

According to a further feature of the invention, the vertical axis aboutwhich the pivotal adjusting movement of the drum is effected is disposedto one side of the drum shaft and in a vertical plane which passesthrough or near the edge of the stationary or dead knife. In thepreferred arrangement, the bearings for the rotary knife drum and the Vpulley driving the drum shaft are carried by a cradle or frame which ismounted for adjusting movement about a vertical fixed pivot in the mainframework. The said fixed pivot is located to one side of the drum shaftas described above and the V drive pulley is arranged so that the beltsare disposed symmetrically about the axis of the said pivot. The V drivepulley shaft may conveniently be carried in a frame constituting anextension or part of the frame carrying the main bearings for the drum,and a worm gear is provided for transmitting the drive from the saidshaft to the drum shaft. A coupling may be interposed between the wormgearing and the drum shaft.

The V pulley associated with the cutter drum shaft will generally bedriven from a similar pulley located vertically beneath it, and the saidlower pulley may be associated with some form of infinitely variablegear through which the drive is taken. Alternatively the V pulleysthemselves may be variable to provide the necessary speed changes. Itwill be appreciated that the V pulley associated with the drum shaftwill be displaced when the latter is displaced to vary the generalinclination of the cutter, and such displacement will involve relativeangular movement of the planes of the two V pulleys. Such angulardifferences will, however, be relatively small and readily accommodatedby the belts without interferring in any way with the drive transmittedthereby.

By this mode of drive the vertical pivot about which the knife drumassemblage is adjusted may be located as near as practicable to the drumand a relatively simple and compact drive ar rangement is afforded.

*jl'O ample, a rotary drum I carrying a cutting knife la of spiral form(the spiral shape beingonly just perceptible owing to the 2 for severingsheets from a web or webs of paper scale .of the. drawings 1 adapted toco-act with a stationaryv or dead-knife or other material is supportedin end bearings,

3 only one of which a frame or cradle 4 supported on the main frame'work 5 of the cutting machine. frame 4 also carries the stationary knife2 which The said.- cradle is arranged to one side of thedrum-shaft. On

the same side of the drum shaft and beyond the.

shaft bearing, the cradle frame 14 has a bracket.

6 forme'dwith a vertical bore, which maybe in a bossprovided onthebracket, fitting over a Vere l pin 1 carried in a bracket 50 ticalfixed pivot boltedsto'the-main supporting framework 5, so thatanydisplacement of the cradlefra m-e .4 is constrained to parallel: to thevertical. plane containing .thelaxis of :the: drum I and passing near-to the cutting take place about theaxis of such pivot pin 1 which axislies-in .a vertical plane.

edge of the. stationary knife 2. At the same-end of the drum; the

its bearing 3 and is connectedby'a coupling 58 toaworrn gear-drive I75the'drivin-g shaftni-I or drum shaft 3 "extends beyond which ishorizontal and at right-angles to the,

drum-shaft:8. Thebearingsiof this shaft I i and of the;worm.gear arealso carried by thebrack-et 6 whichis provided-with thepivotbore; A V-'.

grooved pulley 12 is mountedonthe horizontal shaftJ I and is disposed sothat thecentral plane of the pulley coincides pin'J and-the belt groovesare disposed symmete ricall-y'on-either side thereof. The-pulley iZ haswith the. pivot axis of the multiple .V grooves and belts whicharedriven from a second v.

x I v groove. pulley l-3 mounted vertically beneath the firstjThe saidlower pulley I" I3 may".conveniently'bemountedon the final shaftof aninfinitely variable gearli i such as Reeves'type' gear,"the drive beingmain drive shaft of the'machine;.

60 takenfrom' the"? -rAs shown, this lower pulley means-i3 is mounted sothatthe mean or centralaxis-"of the pivoti.

plane thereof coincides with the Instead of the gear 4 2, the necessaryspeed changes-may be-efiected by the V. pulleysbeingthemselvesvariable-"as to diameter,

The 1 stationary. ranged to one side thereon-the webto be severed beingfed 'thereto cutting knife" is generallyar or. the drum-'and'belowtheiaxis in a downwardlyinclined "direction by feeding rolls precededit" necessary; by rotary slitter knives 1':

which divide the pass to conveyor to fan automatic stacking device.

web longitudinallye -f' After the sheets have b'eensevered by therotaryknifethey-a means and thence ii desired,-. ljhefeeding rolls'and slitterknives aregeneral-ly. carried bythelmain framework on which thev Irotary knife-re is also carried and may be driven.from'the aferevsaidmain shaft by multiple V beltsor ropes: lt

willbe understood-that thecradle frame oarryring' the rotary knife isalso adj ustable through-e horizontal displacement upon the-main:f-ramea work, such adjustment bei r'l-g effectedby-suit-- able screwdevices in conjunction With clamping means.

Since the general arrangement and mounting of the rotary cutting meansmay be Widely varied in accordance With practical requirements it willbe appreciated that the drive arrangement described. "above- I may be-modifiedaccordingly. Whilst the a mountof power required for cuttingwill generally necessitate the use of multiple drivingebelts,circumstances may occur in which a single belt is suificient, or ropedrives may be employed;-

I claimu 1. A drive arrangement for an angularly adjustable rotarymember comprising a main frame, a secondary frame, a rotary memberrotatable aboutah'ori'zontal'axis carried by said secondary frame, acradle embodied with said secondary frame fand "extending longitudinallyof the axis of the member, a fixed bracket extending laterally .of themain fra-me-beneathsaid cradle, said fixed bracket carryinga verticalpivot, said-pivot being-disposed laterallyof the axis of rotation Y ofthe' rotary member andat least closely-ad.--

jacen'tthesmainframe, said cradle having a ver-'-- tical aperturethereinreceiving and journalling said pivotwhereby said-secondaryframezis -swing- I able about said=pivot with'respect-to said-"mainiramegsa, shaft carried" by said cradle at rotary member; saidshaftbeing mounted'above said vertical pivot, pulley; means: carriedb'y:s'aid plane of said pulley'means coin-32 axis of said vertical pivot,second 5 shaft, 'thefmean ciding with the pulley means mounted on saidmain frameuibe-i.

neath said vertical pivot' a'nd' belt means trai'ned about both 's'aid-pulleys =with the runs "thereopassing on opposite 'sides o'fsaidvertical piv'ot and means for impartin right angles with respect tothe axis of rotation of said=- g' variabIe-speed to said pulleyi'ne'ansy the arrangementbeing such that' the clos'e'r' thef verticalpivot axis is disposed with respect to 'theQmain frame the. lessbodily-dis placement of the secondary frame with respectv to the mainframe is required and the lesstwisting' of thebeltmeans' relative to"the pulley is effectedirr order to providea given angular varia tion'-of "therot'ary member relative to the main frame? 2. A drive"arrangementfor an angularly-ad"- justabl'e rotary member comprisin'g incombinattion with a main frame; a cradleisupporting the rotaryr'member,a. pivot means carried'i'by the'f'" mainframe and disposed'in aplanethat'is later ally: offset with relation to the plane containing theaxis or 'the irotary member; means connecting thefcradle to "the jpivot"so that the cradle can swing'thereabout', the location ofthe pivotwith? respect to the axis of the rotary'mern'ber per? mitting' "maximumangular. adjustment of the member withminimum 'swingingi'of thecradle,spaced pulley'mean'si'o-r driving the rotary .mem

ber' respectively fcarri'ed by main frame with the mean ciding with the"axis'of the 'the cradle and .the plane thereof'coin pivot meansandtheplane of thepulley carried by thecradl'ei'being parallel to thea'xis of'therotarymember; flexible" drive" means trained over said pulley meansand" assingsymmetricauy on opposite sidesof 'said piV0t",alXiS,'anutheioeation 0f 'thepulleymean's with respect to the pivot aXi'Sminimizing 'misalignment jof the I pulleymeans "Whe ifthe :cradl'e I isangularlyj adjusted witli respect to th"mai'n frame drive thereforecomprising a main frame, a cradle movable thereon, said rotary memberbeing supported by said cradle, said cradle including an extensionprojecting laterally of said frame, pivot means supported by the frameand connected with said extension, said pivot means being locatedclosely adjacent said frame and laterally offset with relation to theaxis of the rotary member, a drivable shaft carried by said exten sionand disposed perpendicular to the axis of said rotary member, meansconnecting said shaft to the rotary member for driving the same, a firstpulley means carried by said shaft and disposed in a plane parallel tothe axis of the rotary memher and said pulley means being located aboveand with its mean plane coinciding with the axis of said pivot means, asecond driven pulley means carried by the main frame beneath said pivotmeans and disposed in a plane perpendicular to said main frame, with themean plane of said second pulley means coinciding with the axis of thepivot means and flexible drive means trained over both said pulley meansand passing symmetrically on opposite sides of said pivot axis, thearrangement being such that the location of the pivot means closelyadjacent the main frame and with respect to the axis of the rotarymember and the location of the pulley means with respect to the pivotaxis permitting maximum an gular adjustment of the cradle relative tothe main frame with minimum bodily displacement and minimum misalignmentof the pulley means.

4. A drive arrangement as defined in and by claim 2 in which the pulleymeans comprise multiple grooved pulleys and the flexible drive meanscomprise multiple V-belts.

5. A drive arrangement as defined in and by claim 2 and a worm geardrive connected be" tween the first mentioned pulley means and therotary member.

6. A drive arrangement as defined in and by claim 2 and an infinitelyvariable gear means operably connected with said second mentioned pulleymeans.

7. A drive arrangement for an angularly adjustable rotary membercomprising angularly movable supporting means for supporting said memberincluding a pivot means laterally offset with respect to the axis of therotary member and belt and pulley drive means for rotating said memberincluding a first pulley means also carried by the supporting meanslocated above said pivot means with its axis perpendicular to the axisof the rotary member and its mean plane coinciding with the axis of thepivot means and a second pulley means located beneath said pivot meansalso with its mean plane coinciding with the axis of the pivot means andbelt means trained over both said pulley means and passing symmetricallyon opposite sides of said pivot means.

JAMES ECKERSLEY BATIERSBY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 317,612 Barton May 12, 1885483,904 Daggett Oct. 4, 1892 1,043,527 Lindquist Nov. 5, 1912 1,867,335Strecker July 12, 1932 FOREIGN PATENTS Number Country Date 10,788Germany Sept. 8, 1880 89,264 France Mar. 28, 1870 417,871 Germany Aug.20, 1925

